1025908380 has 72 divisors (see below), whose sum is σ = 3556486752. Its totient is φ = 234493056.

The previous prime is 1025908349. The next prime is 1025908391. The reversal of 1025908380 is 838095201.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 405847 + ... + 408366.

Almost surely, 2^1025908380 is an apocalyptic number.

1025908380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025908380 is an abundant number, since it is smaller than the sum of its proper divisors (2530578372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025908380 is a wasteful number, since it uses less digits than its factorization.

1025908380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814235 (or 814230 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1025908380 is about 32029.8045576304. The cubic root of 1025908380 is about 1008.5625992954.

The spelling of 1025908380 in words is "one billion, twenty-five million, nine hundred eight thousand, three hundred eighty".